Is 256MB RAM sufficient?

My S2 is dieing *dramatic music playing* major screen glitch that could render the phone useless depending on what you want to do as the bottom half of the screen blacks out.

I know I have a Lumia but still doesn't fulfil my feature needs.

Im looking to replace it with a cheap new Huawei Ascend Y220 but it only has 256MB RAM, 1GHz dual core and Gingerbread. Im a little cautious as im not sure how applications I frequently use (such as whats app and google chrome) will function with such low RAM ?

Also considering Samsung galaxy pocket /plus/Y and LG L1 II.

Samsungs offering is tempting with their 1GB pm, 1 year wifi promotion but will cost a lot more.